[llvm] r353515 - [AMDGPU][MC][CODEOBJECT] Added predefined symbols to access GPU minor and stepping numbers

[Dmitry Preobrazhensky via llvm-commits]

Author: dpreobra
Date: Fri Feb  8 05:51:31 2019
New Revision: 353515

URL: http://llvm.org/viewvc/llvm-project?rev=353515&view=rev
Log:
[AMDGPU][MC][CODEOBJECT] Added predefined symbols to access GPU minor and stepping numbers

Added the following Code Object v3 symbols:
    .amdgcn.gfx_generation_minor
    .amdgcn.gfx_generation_stepping

Reviewers: artem.tamazov, kzhuravl

Differential Revision: https://reviews.llvm.org/D57826

Modified:
    llvm/trunk/docs/AMDGPUUsage.rst
    llvm/trunk/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
    llvm/trunk/test/MC/AMDGPU/hsa-v3.s

Modified: llvm/trunk/docs/AMDGPUUsage.rst
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/AMDGPUUsage.rst?rev=353515&r1=353514&r2=353515&view=diff
==============================================================================
--- llvm/trunk/docs/AMDGPUUsage.rst (original)
+++ llvm/trunk/docs/AMDGPUUsage.rst Fri Feb  8 05:51:31 2019
@@ -4875,11 +4875,27 @@ symbols do not affect code generation.
 .amdgcn.gfx_generation_number
 +++++++++++++++++++++++++++++
 
-Set to the GFX generation number of the target being assembled for. For
+Set to the GFX major generation number of the target being assembled for. For
 example, when assembling for a "GFX9" target this will be set to the integer
-value "9". The possible GFX generation numbers are presented in
+value "9". The possible GFX major generation numbers are presented in
 :ref:`amdgpu-processors`.
 
+.amdgcn.gfx_generation_minor
+++++++++++++++++++++++++++++
+
+Set to the GFX minor generation number of the target being assembled for. For
+example, when assembling for a "GFX810" target this will be set to the integer
+value "1". The possible GFX minor generation numbers are presented in
+:ref:`amdgpu-processors`.
+
+.amdgcn.gfx_generation_stepping
++++++++++++++++++++++++++++++++
+
+Set to the GFX stepping generation number of the target being assembled for.
+For example, when assembling for a "GFX704" target this will be set to the
+integer value "4". The possible GFX stepping generation numbers are presented
+in :ref:`amdgpu-processors`.
+
 .amdgcn.next_free_vgpr
 ++++++++++++++++++++++
 

Modified: llvm/trunk/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp?rev=353515&r1=353514&r2=353515&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp Fri Feb  8 05:51:31 2019
@@ -923,6 +923,10 @@ public:
         MCSymbol *Sym =
             Ctx.getOrCreateSymbol(Twine(".amdgcn.gfx_generation_number"));
         Sym->setVariableValue(MCConstantExpr::create(ISA.Major, Ctx));
+        Sym = Ctx.getOrCreateSymbol(Twine(".amdgcn.gfx_generation_minor"));
+        Sym->setVariableValue(MCConstantExpr::create(ISA.Minor, Ctx));
+        Sym = Ctx.getOrCreateSymbol(Twine(".amdgcn.gfx_generation_stepping"));
+        Sym->setVariableValue(MCConstantExpr::create(ISA.Stepping, Ctx));
       } else {
         MCSymbol *Sym =
             Ctx.getOrCreateSymbol(Twine(".option.machine_version_major"));

Modified: llvm/trunk/test/MC/AMDGPU/hsa-v3.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/AMDGPU/hsa-v3.s?rev=353515&r1=353514&r2=353515&view=diff
==============================================================================
--- llvm/trunk/test/MC/AMDGPU/hsa-v3.s (original)
+++ llvm/trunk/test/MC/AMDGPU/hsa-v3.s Fri Feb  8 05:51:31 2019
@@ -1,5 +1,5 @@
-// RUN: llvm-mc -mattr=+code-object-v3 -triple amdgcn-amd-amdhsa -mcpu=gfx900 -mattr=+xnack < %s | FileCheck --check-prefix=ASM %s
-// RUN: llvm-mc -mattr=+code-object-v3 -triple amdgcn-amd-amdhsa -mcpu=gfx900 -mattr=+xnack -filetype=obj < %s > %t
+// RUN: llvm-mc -mattr=+code-object-v3 -triple amdgcn-amd-amdhsa -mcpu=gfx904 -mattr=+xnack < %s | FileCheck --check-prefix=ASM %s
+// RUN: llvm-mc -mattr=+code-object-v3 -triple amdgcn-amd-amdhsa -mcpu=gfx904 -mattr=+xnack -filetype=obj < %s > %t
 // RUN: llvm-readobj -elf-output-style=GNU -sections -symbols -relocations %t | FileCheck --check-prefix=READOBJ %s
 // RUN: llvm-objdump -s -j .rodata %t | FileCheck --check-prefix=OBJDUMP %s
 
@@ -44,8 +44,8 @@
 .text
 // ASM: .text
 
-.amdgcn_target "amdgcn-amd-amdhsa--gfx900+xnack"
-// ASM: .amdgcn_target "amdgcn-amd-amdhsa--gfx900+xnack"
+.amdgcn_target "amdgcn-amd-amdhsa--gfx904+xnack"
+// ASM: .amdgcn_target "amdgcn-amd-amdhsa--gfx904+xnack"
 
 .p2align 8
 .type minimal, at function
@@ -187,6 +187,12 @@ special_sgpr:
 .byte .amdgcn.gfx_generation_number
 // ASM: .byte 9
 
+.byte .amdgcn.gfx_generation_minor
+// ASM: .byte 0
+
+.byte .amdgcn.gfx_generation_stepping
+// ASM: .byte 4
+
 .byte .amdgcn.next_free_vgpr
 // ASM: .byte 0
 .byte .amdgcn.next_free_sgpr